Commutator-assembling device.



July 9, 1918. TS-SHEET .1.

Patentefi 2 S H E E L. A. ALEXANDER.

COMMUTATOR ASSEMBLING DEVlCE.

APPLICATION FILED MAR- 3. I917.

L. A. ALEXANDER.

COMMUTATORASSEMBLING DEVICE.

APPLICATION FILED MAR-3.1917.

2 SHEETS-SHEET 2.

UNITED STATES PATENT orrron.

LOUIS A. ALEXANDER, OF TOLEDO, OHIO, ASSIGNOR TO THE TOLEDO COMMUTATOR 00.,

. OF TOLEDO, OHIO, A CORPORATION OF OHIO.

GOMMUTATOR ASSEM BLIN'G DEVICE.

To all whom it may concern:

Be it known that I, LoUIs A. ALEXANDER, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in commutator-Assembling Devipes; and I do declare the following to be a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to the assembling of segmental commutator-bars and their associated parts, and its object is to provide devices for centering and compressing and fix edly securing these parts radially and longitudinally in their proper relation. 1

To these ends, my invention consists of the devices, construction and arrangement of arts hereinafter described, and illustrated in the accompanying drawings, in which- Figure 1, is a top-plan view of my device,

seen from beneath the plunger, hereinafter referred to; Fig. 2, a central vertical sectional elevation of the same, taken on line :c-x, Fig. 1, showing the plunger in elevated position and the commutator-parts assembled and held in position to be operated upon; Fig. 3, the same, with the plunger in its lower position and with the commutatorparts compressed into and fastened in their propgr and final relation, andFig. 4, a perspectlve outline of one of the radially movable jaws hereinafter referred to, detached.

Like letters and numerals of reference indicate like parts throughout the drawings.

In the drawings, 1 is a base from the top of which springs a circularly arranged series of short stout pillars 2, cast or formed, preferably, integral with the base. 3-3 are jaws, in the present instance, for illustration, six in number, which constitute true equal segments of a strong flat ring or cylinder. The segments 3 rest and move radially upon the smooth fiat top of a. follow-block 4 which fits with a working fit in recess 5 in the top of the base 1 and which is provided on its under side with a member, 6, which moves vertically in a socket 7 in the base 1. The follow-block 4 is held normally elevated by springs 8 inter osed between the base and the follow-bloc Specification of Letters Patent.

Patented July 9, 1918.

Application filed March 3, 1917. Serial No. 152,290.

99 are toggle-bars the opposite ends of which are provided with heads, as at 10, to form bearing-portions. The pillars 2 and the jaws 3 are disposed in corresponding radial vertical planes and have opposed corresponding recesses 11 for the reception of and engagement with the heads 10 0f the togglebars.

The inner faces of the segmental jaws 3 are recessed to correspond to and to receive the outer surface of an assembled collection of commutator-bars a, including the radial commutator-arms. 6. These commutatorbars are notched at each end, in the usual manner, as at c, for the reception of clamping-rings d. In the present instance, for illustration, the lower clamping-ring d is integral with an internal commutator-sleeve e. In the center of the top of the followblock is seated an anvil 12 having a raised boss 1,2 which fits into the lower end of the sleeve 6. 13 is an anvil-portion seated in the center of and carried by a ram 14 which is actuated by any suitable press. The

anvil 13 has a downwardly projecting central boss 13 co-axial with theanvil 12 and adapted to enter the upper end of the sleeve,

the boss being encircled by an undercut groove or channel 15.

The operation of my device is as follows: The commutator-bars, together with their usual associated insulating devices and thetion of the anvil 13 enters the upper end of the sleeve 6. The ram continues to descend, overcoming the upward stress of the springs 8, pressing downwardly the jaws 3 and the follow-block 4: until it strikes the bottom of its recess 5. This movement swings the inner ends of the toggle-bars downwardly and inwardly so that the bars lie nearly in a horizontal plane, thus powerfully pressing the segmental jaws 3 toward their common center, thus pressing the several members of the commutator radially toward the vertical axis of the device and settingup and truing and centering the several parts of the commutator. As the ram descends, the groove 15 receives the upwardly projecting end of the internal sleeve e, the groove being of such shape in cross-section that the end of the sleeve is peened outwardly and" squeezed into and rigidly secured in their.

proper operative relation. As the ram 14 retreats the springs 8 force upwardly the follow-block which carries with it the jaws 3 which are, by the upward swing, of the inner ends of the toggle-bars, now retracted, thus releasing the commutator from the grasp of the jaws, permitting the removal of the commutator, and placing the device in position for a repetition of the operation.

Having described-my device, what I claim and desire to secure by Letters Patent, is-

1. In a commutator assembling device, a series of circularly arranged segmental jaws, the inner faces of said jaws being recessed to collectively conform to the outer circumference of a commutator, means for applying axial pressure upon such commutator, and means disposed between the points of application of such axial pressure for radially projecting into closed relation and for retracting into open relation said aws.

2. In a commutator assembling device, a series of circularly arranged segmental jaws, the inner faces ofwhich are recessed to collectively conform to the outer circumference of a commutator, a press arranged to apply end-pressures upon such commutator. and devices located between'the points of application of said end-pressures for radially projecting and retracting-said jaws simultane: ously with'the movement ofthe press.

3. In a commutator assembling device, a series of circularly arranged segmental jaws having inner faces recessed to collectively conform to the outer circumference of a commutator, and to provide a central opening for the reception of such commutator, press-members operatively disposed at opposite ends of such opening, and means disposed intermediate said press members for radially actuating said jaws in harmony with the movement of said press-members to impart simultaneous radial and end pressures upon such commutator.

' to move into contact with the bottom of such 4. In a device of'the described character, a base, a follow-block carried by base, a series of circularly arranged seginental" jaws movable radially upon the follow-block, toggle-arms connected with the base arid.- with the jaws and a ram'co a'xial with said. jaws and said follow-block. a

.5. In a device of the described character, a base, a follow-block on the base, a series of circularly arranged jaws radially movable upon said follow-block, the inner faces of said jaws being recessed to conform to 'the outer circumference of a commutator and to provide a central opening for the reception of such commutator, converging arms which connect said jaws with the base, a ram, an anvil-member carried by the ram. and having a centrally projecting boss, a like anvil-member carried by the follow-block said ram, jaws, follow-block and anvil-members being co-axially disposed, the arrangement being such that the jaws and the follow-block move in harmony with the ram.

\ 6. In a device of the described character, a recessedbase, a spring-supported followblock mounted in said recess and arranged recess, a series of circularly arranged jaws radially movable upon said follow-block, the inner faces ofisaid jaws being recessed to conform to the outer circumference of a commutator and to provide a central openring for the reception of such commutator,

converging arms which connect said jaws with the base, a ram, an anvil-member carried by the ram and having a centrally projecting' force, a like anvil-member car- 5 I ried by thefollow-block, said ram, jaws, follow-block and anvil-members being co-axially disposed, the arrangement being such 7 that the jaws and the follow-block move in harmony with the ram. In testimony whereof I aflix my signature in presenceof two witnesses. v LOUIS A. ALEXANDER. Witnesses:

LOUIS JACOBSON, S, N. Show.

It is hereby certified that in Letters Patent 1,272,,17 6, granted July'9, 1918,

upon the application of Louis A. Alexander, of Toledo, Ohio, for an improvement in Commutator Aseembling Devices, an error appears in the printed specification requiring correction follows: Page 2', line 85, claim 6, for the word force read boss; and that the said Lettere Patent should be read with'this correction therein that the same may conform tothe record of the case in the Patent Ofiiee. i v

Signed and sealed this 30th day of July, 1)., 3918,, I [SELL-1 j v i R, RW ITEHEAD,

Acting bommz'ssioner of Patients. ()1. 29-84, i v 

